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本文在结合承压水上采煤的实践和参考煤炭工业部《矿井水文地质规程》的基础上，进行了详细的理论分析，提出了断层上下盘及其陷落柱合理防水煤柱尺寸的计算理论公式。以太原市东山煤矿为例，给出了不同开采水平的构造防水煤柱的合理尺寸，并用于带压开采设计。
Based on the practice of confined water mining and the reference to Mine Hydrogeological Regulation of Coal Industry Ministry, the paper makes a detailed theoretical analysis and puts forward the calculation formula of the reasonable water-proof coal pillar size of the upper and lower plates of the fault and its sinking column . Taking Dongshan Coal Mine in Taiyuan City as an example, the reasonable size of the structural water-proof coal pillars with different mining levels is given and used for the design of pressure mining.